摘要
通过在静力单元刚度矩阵的主对角元素上增加与移动速度有关的项,得到移动问题有限元的单元刚度矩阵,从而将动力学问题转化为"拟静力"问题处理。然后用拟静力有限元方法求解了地基在高速移动荷载下位移随速度变化的问题,通过与解析解的对比,验证了该算法的可行性和正确性。
The moving velocity terms were added to the principal diagonal elements of the static element stiffness matrices, then the dement stiffness matrices of moving problem can be established. In this way, the dynamic problem was transformed to "quasi-static" problem. Then the displacements which vary with the velocity of high-speed moving loads were calculated by the quasi-static finite element method. The result was compared with the analytical solution to validate the feasibility and correctness of the arithmetic.
出处
《山西建筑》
2008年第33期31-32,共2页
Shanxi Architecture
关键词
移动荷载
有限元方法
拟静力问题
动态弹性模量
moving load, finite element method, quasi-static problem, dynamic modulus of elasticity